Portable sawing machine



Feb. 8, 1927. LBEU'S N. M. NELsQN ET AL Q PORTABLE SAWING MACHINE Filed July 5, 1925 mento/c @zu 7M." M

@www

Patented Feb. 8, 1927.

NELS M. NELSON AND HENRY F.

hlt-,55

NELSON, 0F 'WHITE BIRD, IDAHO.

PORTABLE SAWING MACHINE.

Application ined 'July 3, 1925. serialV no. 41,315.

l Our. present invention relates to improvements in portable sawing machines of the power operated type adapted especially for use Vin cutting or sawing up felled vtimber intoflog lengths or fo-r cording purposes.

Our invention contemplates the` use ofan automotive machine. capable of propulsion from place to place for the performance of sawing operationsin the woods, and comprises certain novel features ofconstruction and combinations and arrangements of parts whereby the machine may be adjusted to a logfor sawing and relatively fixed in opertive position, and from which .position the machine-may with equal facility be withdrawn for readjustment in completing the cutting up of felled timber into logs. Means are provided for quickly and conveniently converting the power mechanismV from use for propelling the machine to the performance of the sawing operations, and other featuresl of merit reside in the machine as `will hereinafter be more specifically pointed out and claimed.

In they accompanying drawings we have illustrated one example of the'physical. embodiment of our invention in connection witha reciprocating saw-0f the drag type and utilizing a crank movement for the saw blade. The lparts are herein combined-and arranged according to the best mode we have so far devised for the practical application of the principles of our invention.V

Figure 1 is a View in side elevation showing the sawing machine in operative position with a reciprocating, crank operated saw shown in dottedy lines.

Figure 2 is anenlarged top `plan view showing a portion of thepower transmission mechanism, and illustrating. also two of the supporting' wheels for the machine.

Figure 3 is an enlarged view `in side elevation showing `the steering wheel and means for anchoring one end of the machine in position during a sawing operation.

Figure 4 is a top plan view of the device shown in Figure 3.

A In carrying out our invention we preferably use. a light butv strong 'main frame including. a pair'of converging or angularly disposed bars l and 2 that form avv-shape frame Afrom which the transversely. disposed aXle'Bis-supported by hangers 4 beneath the bars, andthe aXle is journalled'in bear- Sings' asin these hangers.

At the rear or pointed. endofthelframe a castor wheel- 6 is locatedywhich supports the frame when' the machine is sawinmand is used to steer lthe machine whenit is heing propelled byv power. supplied .from the motor 7. The motor is of suitable type,` preferably a gasoline engine and is supportedyabove the frame in position toY counterbalance the load of the machine. The transversely arranged drive shaft 8 of the motor isprovided with a balance wheel 9`and` the-:operating. shaft-.10 -offthe machine is arranged parallel with the drive shaft at; the rear thereof and journaled in bearings l1,on Athe top of the bars .of the frame. `Power .is

transmitted from the` drive. shaft 8 to theV operating shaft l0 `through the :driving sprocket wheel 1 2 onashaft;8,- chainflB-and thedriven sprocket wheell4 on. lthe loperating shaftlO. Y

The-operating shaft isprovided-with a crank arm l5 secured on one vof itsendsi for actuating 'the .reciprocating .drag saw 16 through. the connecting pltman `17, :the .saw

and .pitnian being shown. infdotted lines yin Figure l.

In Figure l it will. be vseen vby dotted v:lines e thatthe front ends .ofthe frame bars are each equipped with a dog asl8'whavingan .arm 19 pivoted .to theinneri face ofthe fbar .at 20. In` operating. position the frame-is pushed forward to bring the front ends of the frame bars to rest on top'of the log 2l, and tlientlie dogs or spikes v18, are driven into the log for the purpose of .attaching the machine framev to the log withthe rear 4end of the frame supported onthe castor wheel 6. The reciprocating drag saw .is

y suspended at oneside of the machine frame and of course reciprocates 'transversely .of the log and is free `to adjust itself to the log as the. kerf `is lcut therein.

The machine frame .is adjustable for the ,purpose of raising or lowering the position lofl the operating shaft vforthe purposeof adapting the saw to vvarious ydiameters .of iogs to be cut. .For this adjustment we provide' the castor wheel with a shank or bar 522 having rack teeth'QQ/.and `theishank or Vrack bar is supported in a bushing 23 bolted at the pointedend ofthe V-shaped frame. Theframe is` movable vertically andY guided by the bushing on the rack bar which latter is of suiiicient length to permit of' adequate movement of the. frame with 'relation .to :the rack bar.

A rackwheel 24C is used. in co-action with tothe bar and for directly supporting the p frame on the bar when the machine is being transported. This wheel is carried on -a transversely disposed shaft havingV av handle 26, and a U-'shaped frame 27 having Y-gitudinally extending, vertical slots 28 tov a pair of spaced bearings or bearing plates the machine may be transported from place 28 is provided to retain the shaft in position. These bearing plates are provided with lonaccommodate the shaft and the slots are of tothe rack bar 22 the stake is provided with Vio such a length as to permit lateral adjustment ofthe Vshaft in them. Each bearing plate has a pin a's`29 which is passed through ver-- tical openings in the plates to co-act with the plates in retaining the shaft in, its bearings. Y f

For anchoring the rear end of the frame ingrigid and stable position we employ a metal stake located preferably 'between the two bars of the main frame and slidable in vertically spaced bushings or guide sleeves A key 30L engaging complementary grooves in the stake and walls o-f the bushings prevents rotary movement or vturning of the stake upon its axis. At its side adjacent a set of 4teeth 32 complementary tothose of the rack bar and .adapted to beengaged by the rack wheel 24;.' rllhe rack Wheel is adapted for selective use with either of the toothed membersthe bar 22 or the stake. The stake, as indicated in Figure 3 is adapted to be driven into the ground with blows from a vhammer or maul, to anchor the machine Yframe against lateral movement. "When the machine isy to be readjusted or withdrawn from use, the stake is lifted by 'means of the rack wheel. For this purpose the rack wheel is shifted from its rack bar 22 by and first removing the pins or bolts 29, then sliding the shaft with its wheel along the slots of the bearing plates, to the right in Figure 3, to the righ-t ends of the bearing slots. Then the pins are inserted in the vperforated bearing plates to retain the shaft in position. By turning the handle 26 the stake will'be lifted from the ground, after which the rack wheel and its shaft may .be shifted again if desired.

Power from the motor is selectively used for propelling the machine or for operating the reciprocating saw, and a clutch 33 of usual type is provided on the shaft 3 and operated by the clutch lever 34 in usual manner for controlling the transmissionV of power. v j

For propelling the machine a driving sprocket 35 is carried on the operating shaft the chain 36 from this sprocket passes over a driven sprocket wheel`37 on the axlev 3. Two supporting wheels 38 and 39, the former a traction or drive wheel fixed on the axle, are provided at the ends of the axle 3, and

it will be apparent that the machine is supported on these two wheels together with the steering or castor wheel 6. As the machine is propelled by power, it is Asteered or guided manually by use of the steering han-l dle `40 .attached at rthe rear of the main frame. As thus arranged it will be obvious that the machine are arranged to uniformly distribute the load on the frame, and the minimum number of partsemployed insure reliability and facilityk in operating the machine. j

In applying the machine frame to the, timber', in order that vvawide area ofsupport may be afforded to stabilize thema- Ving of time andv labor. The several parts of Y chine, the front ends of the frame bars rest on the timber, the two wheels 3S and 39 rest on the ground, and the third wheel 6 alsorests upon the ground kas an additional support. In order to adapt the machine vto receive support at these four points it may be necessary to adjustfthe rear endy of the frame with relation to theV castor wheel by manipulating the crank handle 26 yof the rack wheel to either lower the frame or raise it with relation to the castor wheel. .This

adjustment can readily be eected and the V load of the machine thus distributed at the four points to insure stability of the stationary parts. n

By use of our construction hereinspecified we are enabled to provide an attachment to the standard sc wing rigs so that the devices of our invention may be adapted to any such rig no matter where found by the simple Y expedient of attaching tractor elements to the usual-saw frames by means ofy the pins or bolts 41, and can as easily be removed by withdrawing the said pins or bolts.L

Having thus fully described our invention what we claim as new and desire to secure by Letters Patent is 1. The combination in a portable sawing machine with a main frame and a removable anchoring stake having rack teeth thereon, of a supporting wheel having, a stationary guide memberfor co-action with the frame, said member comprising a toothed bar loosely supported in a-bushing on the frame, a rack wheeljournaled on the frame intermediate saidv stake and toothed bar, and means adapting said rack wheel for selective use with said stake and bar. n

2. The combination in a port-able sawing frame and with said stake for removal of machine With a. main frame and a removthe latter. able anchoring stake carried 'thereb-y, of a In testimony whereof We ax our sgna.- 10 supporting Wheel having a. stationary guide tures. 5 member for (3o-action with Jche frame, and A means carried by the frame for selective use NELS M. NELSON. Wit-l1 said guide member for adjusting the HENRY F. NELSON. Y 

